Physical reactions to the stress

I'm just curious to see if anyone else has noticed/experienced this, as I definitely have.

I'm a firm believer that if someone or a situation isn't good for you, your body will let you know. And I definitely noticed some examples of this happening during my friendship with my fwBPD.

I used to have really bad acne, typically caused by stress and hormones when I was younger. At the time I met this person, my acne had considerably healed and I hadn't had any breakouts for a good several months. Which was most likely due to my life slowing down and mellowing out. However, fast forward to a few months after meeting them, when all the fights, manipulation, codependency, etc. Started to ramp up, my acne followed suit. I started having more aggressive breakouts which were more painful and explosive than anything I'd really experienced before.

Before I met them, I had also dealt with anxiety. But nothing too extreme that caused any physical ailments. And just before meeting them, my anxiety had been at an all-time low. However, again, after meeting them that became a different story. I started experiencing anxiety that genuinely felt chest-crushing, made me sick to my stomach, messed with my gut, and caused me to physically tremble. This was triggered by anything trivial that came up in conversation with them, thinking about having to talk to them, and arguments with them.

I noticed more constant fatigue/tiredness, and brain fog around them. Even on days where I had done nothing more than rest and talk to them. I couldn't think nearly as sharply as I normally did, nor could I convey my thoughts accurately which I had never struggled with before.

This was all stuff I experienced strictly around them, texting them, and thinking about them or our friendship. It only seemed to subside when I started distancing myself from them. My general routine and self care regimen stayed consistent before meeting them and after, so it wasn't anything I had been doing differently causing any of this.

Stress manifests itself in many different ways, and for me, that happens to be just as physical as it is mental. So I'm curious if any of y'all have experienced this as well in regards to your relationship with a pwBPD, and if so, what did it look like for you?